For many travelers, this public bathroom door is completely mundane and banal. However, countless viewers have made it clear that they have never seen a public toilet with a privacy door made entirely from glass.

Only when the occupant locks the door does the glass become translucent, blocking any peering eyes from seeing in.

British traveler Ian Howlett was in Vienna, Austria when he couldn’t help but video record the rare bathroom privacy door.

For those worried the glass may revert to clear while they are busy with their pants around their ankles, the doors actually only become clear with an input of power. Their nature state is frosted and unclear.

Now, the new video has gone viral over the weekend, amassing over 130,000 views.

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